Don't you just love it when television shows decide to change things up for an episode and put all the characters into a new setting. For a majority of the episode we see the entire Parks Department NOT at City Hall, but instead they are out camping. For most of these characters this is unfamiliar territory and we see all of them trying to adjust to a new habitat. This episode is not great because of its premise or how influential it is to the series. It's just a flat-out hilarious episode with many quotable lines and funny moments.
The premise is very simple. The entire department going camping to try and figure out a new and better idea than the Harvest Festival, which was a major success. That's pretty much all this episode is about, yet it's still so funny because of how fleshed out and different all these characters are from one another. All these characters have their own identity and traits: Tom brings a decked-out tent that he names Skymall which includes a tv, dvd player, xbox, and a fondue maker; Ben clearly has never been camping before in his life. "I'm just gonna sleep on the floor. It's called the ground when it's outside;" April hates camping and will only go because of Andy, but Andy is lost and can't find the campsite; And Ron on the other hand loves camping, but would rather do it alone. I love the scene where he is fishing and Jerry is telling him really uncomfortable, personal stories. Ron's face is priceless.
I personally love episodes like this that focus more on the characters and not on a convoluted story. There are no guest stars or really any ongoing storylines that need to be continued. It's just a simple episode that focuses entirely on this wonderful cast and their characters. For a lot of shows, it could have been a boring, filler-type episode, but for a show like Parks, it works because of the great cast.